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A general guide for using the Forum with some rules and tips
The information provided within this Forum about localities is only given to allow reference to them. Any visit to any of the localities requires you to obtain full permission and relevant information prior to your visit. FMF is strictly against any illicit activities related to collecting minerals.
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| Search found 257 matches |
| Author | Message |
|---|---|
 Topic: Help to identify a find |
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| Josele Replies: 9 Views: 2091 |
 Forum: What is it? - Where is it from? Posted: May 23, 2024 14:17 Subject: Re: Help to identify a find |
| Hi Silvia, welcome to FMF.
Really looks like anthropogenic silicon carbide. |
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| Topic: Provide Miller indices in practice please |
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| Josele Replies: 11 Views: 1982 |
Forum: Minerals and Mineralogy Posted: May 21, 2024 17:26 Subject: Re: Provide Miller indices in practice please |
| Miller indices determination is not an identification method but just a witty way to name crystal faces.
Knowing the crystal system of a sample in addition to hardness, density, streak color, kind ... |
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| Topic: Mineral identification tips |
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| Josele Replies: 9 Views: 1669 |
Forum: Minerals and Mineralogy Posted: May 18, 2024 09:12 Subject: Re: Mineral identification tips |
| I tried to explain how Miller indices work here:
https://www.foro-minerales.com/forum/viewtopic.php?p=151654#151654 (in Spanish). Maybe this can help... |
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| Topic: Fluorite twin mistery |
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| Josele Replies: 2 Views: 1436 |
Forum: What is it? - Where is it from? Posted: Apr 03, 2024 16:58 Subject: Re: Fluorite twin mistery |
| Just commenting that the only fluorite fluorescing red that I remember is Mexican. | |
| Topic: Trying to find information on rose/pink quartz and tourmaline associations. |
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| Josele Replies: 17 Views: 5887 |
Forum: Minerals and Mineralogy Posted: Mar 29, 2024 09:43 Subject: Re: Trying to find information on rose/pink quartz and tourmaline associations. |
| Indicolite and rose quartz are well known in Parun pegmatite field, Nuristan, Afghanistan, although rarely seen together.
https://www.mindat.org/loc-9019.html |
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| Topic: Tucson 2024 - It's started! |
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| Josele Replies: 84 Views: 34710 |
Forum: News about Shows Posted: Jan 25, 2024 14:15 Subject: Re: Tucson 2024 - It's started! |
| Thanks for the excellent report Bob, you must be in shape to endure these long walks in Tucson.
By the way, the aquamarine and fluorite pieces labeled above as from Alchuri Mineral: mainly aquamarin ... |
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| Topic: I want to know the sample |
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| Josele Replies: 21 Views: 9459 |
Forum: What is it? - Where is it from? Posted: Dec 09, 2023 13:21 Subject: Re: I want to know the sample |
| Such as what tests are required
I would say that the first thing is to discern between siliceous or carbonate material. Perhaps you can repeat the hardness test by trying to scratch a bottle glass be ... |
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| Topic: Please identify. |
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| Josele Replies: 8 Views: 6425 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Jan 11, 2023 09:11 Subject: Re: Please identify. |
| I would say all three are glass (lots of bubbles), not natural. | |
| Topic: Any Ideas? |
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| Josele Replies: 22 Views: 17041 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Dec 29, 2022 15:08 Subject: Re: Any Ideas? |
| Looks like a water worn piece of colorless corundum found in a placer deposit. Measured SG fits corundum and trigons on basal pinacoid faces also fits.
Is not so rare find relocated specimens far a ... |
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| Topic: John Attard stolen specimens |
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| Josele Replies: 1 Views: 16523 |
Forum: Reporting thefts and disappearances Posted: Nov 16, 2022 18:21 Subject: John Attard stolen specimens |
| Sad news but not so much, no one has died. It is about a robbery two weeks ago at John Attard's family home in San Diego, California.
Contact information and stolen specimens can be seen here: http ... |
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| Topic: Locality for a Väyrynenite? |
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| Josele Replies: 13 Views: 25112 |
Forum: Improving the FMF Data Base of localities Posted: Oct 20, 2022 10:32 Subject: Re: Locality for a Väyrynenite? |
| No way to find any reference of Lolu Dahku Mine. I suspect it could be one of the many mines near Shengus which are well known for vayrynenite finds.
In any case if it is in Roundu Valley, from 2019 ... |
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| Topic: Twinned Topaz? |
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| Josele Replies: 8 Views: 9878 |
Forum: What is it? - Where is it from? Posted: Jul 01, 2022 07:43 Subject: Re: Twinned Topaz? |
| Have never read about topaz twinning, so I would tend to distrust.
Yannick, in addition to the hardness you can easily check density to confirm topaz: Specific Gravity Test. |
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| Topic: Red fluorescence in Fluorite |
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| Josele Replies: 13 Views: 15524 |
Forum: Minerals and Mineralogy Posted: Jun 28, 2022 17:51 Subject: Re: Red fluorescence in Fluorite |
| Looks more like La Collada, to meBerbes sample with a moderated blue fluorescence concentrated at the edges and a slight red fluorescence in some interior layers:
James, from long time ago I had th ... |
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| Topic: Calcite in Malkhan elbaite |
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| Josele Replies: 8 Views: 5730 |
Forum: Minerals and Mineralogy Posted: May 19, 2022 12:23 Subject: Re: Calcite in Malkhan elbaite |
| Another vote for plagioclase.
Although uncommon, calcite in pegmatite can occur indeed. |
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| Topic: Is this a ruby? |
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| Josele Replies: 12 Views: 6813 |
Forum: What is it? - Where is it from? Posted: May 09, 2022 08:26 Subject: Re: Is this a ruby? |
| ... I wonder if it is a ruby.
I would say that it is common corundum. To properly merit the ruby title it should be transparent, gem quality. But as the term ruby indicates a corundum variety and va ... |
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| Topic: The Mizunaka Collection |
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| Josele Replies: 2496 Views: 2354037 |
Forum: Collection photos and Collector's page Posted: Apr 29, 2022 15:20 Subject: Re: The Mizunaka Collection |
| Olé, at last a faden quartz on matrix!
The elongated "inclusion" seems crystallographically parallel to the main crystal, in which case must be a negative crystal. A solid crystal parall ... |
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| Topic: Tourmaline - Quartz epitaxy? |
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| Josele Replies: 7 Views: 6350 |
Forum: Minerals and Mineralogy Posted: Apr 24, 2022 09:01 Subject: Re: Tourmaline - Quartz epitaxy? |
| Well, then there are very few possibilities of epitaxy in my sample, if any. After all this parallel growth will remain unexplained at the moment.
Thanks for your help. Pete, I sent you a PM. |
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| Topic: The Mizunaka Collection |
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| Josele Replies: 2496 Views: 2354037 |
Forum: Collection photos and Collector's page Posted: Apr 24, 2022 06:00 Subject: Re: The Mizunaka Collection |
| Am, nice specimens and superb photos, it's a pleasure to see them, congratulations.
In last photos, is rhodochrosite replacing a vegetal structure as occurs in travertine? Or it is an inorganic cry ... |
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| Topic: Tourmaline - Quartz epitaxy? |
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| Josele Replies: 7 Views: 6350 |
Forum: Minerals and Mineralogy Posted: Apr 23, 2022 16:44 Subject: Re: Tourmaline - Quartz epitaxy? |
| Pete, new photos, two of them photomicrographs of a tourmaline prism face.
Many quartz prisms are in contact but others are not. Some of them have a small but obvious deviation from the general orien ... |
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| Topic: Tourmaline - Quartz epitaxy? |
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| Josele Replies: 7 Views: 6350 |
Forum: Minerals and Mineralogy Posted: Apr 22, 2022 16:54 Subject: Re: Tourmaline - Quartz epitaxy? |
| Marco, sorry I don't see any sign of epitaxy in your specimen. Tourmaline orientation looks like parallel to one of the quartz termination edges but with only one crystal included this is likely a coi ... | |
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